config = config/{operation module utility}
bin = bin/{target rule module}
cxx = cxx/{target rule module}

exe{b}: cxx{b algorithm name operation spec scope variable target \
  prerequisite rule file module context search diagnostics token lexer \
  parser process timestamp path path-io utility filesystem dump options \
  $config $bin $cxx}

#@@ TODO
#
# cli --include-with-brackets --include-prefix build --guard-prefix BUILD --hxx-suffix "" options.cli